libcxx/test/std/numerics/numarray/template.gslice.array/gslice.array.comp.assign/shift_left.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <valarray>
  10
  11 // template <class T> class gslice_array
  12
  13 // void operator<<= (const valarray<value_type>& v) const;
  14
  15 #include <valarray>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 int main(int, char**)
  21 {
  22     int a1[] = { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11,
  23                 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
  24                 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35,
  25                 36, 37, 38, 39, 40};
  26     int a2[] = {  1,   2,   3,   4,   5,   6,   7,   8,   9,  10,  11, 12,
  27                  13,  14,  15,  16,  17,  18,  19,  20,  21,  22,  23, 24};
  28     std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
  29     std::valarray<int> v2(a2, sizeof(a2)/sizeof(a2[0]));
  30     std::size_t sz[] = {2, 4, 3};
  31     std::size_t st[] = {19, 4, 1};
  32     typedef std::valarray<std::size_t> sizes;
  33     typedef std::valarray<std::size_t> strides;
  34     v1[std::gslice(3, sizes(sz, sizeof(sz)/sizeof(sz[0])),
  35                       strides(st, sizeof(st)/sizeof(st[0])))] <<= v2;
  36     assert(v1.size() == 41);
  37     assert(v1[ 0] ==  0);
  38     assert(v1[ 1] ==  1);
  39     assert(v1[ 2] ==  2);
  40     assert(v1[ 3] ==  6);
  41     assert(v1[ 4] == 16);
  42     assert(v1[ 5] == 40);
  43     assert(v1[ 6] ==  6);
  44     assert(v1[ 7] == 112);
  45     assert(v1[ 8] == 256);
  46     assert(v1[ 9] == 576);
  47     assert(v1[10] == 10);
  48     assert(v1[11] == 1408);
  49     assert(v1[12] == 3072);
  50     assert(v1[13] == 6656);
  51     assert(v1[14] == 14);
  52     assert(v1[15] == 15360);
  53     assert(v1[16] == 32768);
  54     assert(v1[17] == 69632);
  55     assert(v1[18] == 18);
  56     assert(v1[19] == 19);
  57     assert(v1[20] == 20);
  58     assert(v1[21] == 21);
  59     assert(v1[22] == 180224);
  60     assert(v1[23] == 376832);
  61     assert(v1[24] == 786432);
  62     assert(v1[25] == 25);
  63     assert(v1[26] == 1703936);
  64     assert(v1[27] == 3538944);
  65     assert(v1[28] == 7340032);
  66     assert(v1[29] == 29);
  67     assert(v1[30] == 15728640);
  68     assert(v1[31] == 32505856);
  69     assert(v1[32] == 67108864);
  70     assert(v1[33] == 33);
  71     assert(v1[34] == 142606336);
  72     assert(v1[35] == 293601280);
  73     assert(v1[36] == 603979776);
  74     assert(v1[37] == 37);
  75     assert(v1[38] == 38);
  76     assert(v1[39] == 39);
  77     assert(v1[40] == 40);
  78
  79   return 0;
  80 }